In July 2014, EFSA provided her opinion on a study that proposes parameters for poultry electrical waterbath stunning different to those laid down in Council Regulation EU 1099/2009 on the protection of animals at the time of killing.

The submitted study reports upon the use (mean + SD) of a current of 104.00 ± 3.88 mA, a voltage of 125.86 ± 3.28 V and a frequency of 589.78 ± 0.63 Hz using a square wave in alternating current (AC) with a 50 % duty cycle. These conditions were applied for 15 seconds to chickens under laboratory and slaughterhouse conditions.
The methodology and the data reported do not provide conclusive evidence that the combination of the proposed electrical frequency and current induced unconsciousness without exposing the chickens to avoidable pain and suffering, and some chickens did not remain unconscious for a sufficient time to prevent avoidable pain and suffering during slaughter.

EFSA stated in their report that it was doubtful that recovery of consciousness could be avoided prior to neck cutting and/or during bleeding. The minimum duration of unconsciousness was reported to be 11 seconds, which is too short to permit a feasible stun-to-stick interval. Further, it is also doubtful that recovery of consciousness could be avoided prior to neck cutting and/or during bleeding. The minimum time to resumption of breathing was reported to be 8 seconds following stunning.

Application of a current less than that required inducing immediate unconsciousness causes pain, distress and suffering. The study failed to demonstrate absence of pain and suffering until onset of unconsciousness. The minimum duration of unconsciousness was too short to ensure unconsciousness until death by bleeding.